Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 858 [Rate centres in NPA 858] [Dial plan for NPA 858]

NXX: 878

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-878 A La Mesa CA SNDGCA0263Z  965H FRACTEL, LLC 732      
858-878 0 La Mesa CA   981E BANDWIDTH.COM CLEC, LLC - CA 732   2022-11-25   
858-878 1 La Mesa CA   981E BANDWIDTH.COM CLEC, LLC - CA 732   2022-11-25   
858-878 2 La Mesa CA   649C ONVOY, LLC - CA 732   2022-08-27   
858-878 3 La Mesa CA   981E BANDWIDTH.COM CLEC, LLC - CA 732   2022-11-25   
858-878 4 La Mesa CA   981E BANDWIDTH.COM CLEC, LLC - CA 732   2022-11-25   
858-878 5 La Mesa CA   649C ONVOY, LLC - CA 732   2022-12-15   
858-878 6 La Mesa CA   073H TELNYX LLC 732   2024-10-29   
858-878 7 La Mesa CA   6010 NEW CINGULAR WIRELESS PCS, LLC 732   2022-11-17   
858-878 8 La Mesa CA   965H FRACTEL, LLC 732   2022-04-21   
858-878 9 La Mesa CA   6010 NEW CINGULAR WIRELESS PCS, LLC 732   2022-07-30   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.